How many combos can one exchange account run
One account can serve several combos at the same time. Each combo has its own combo position, parameters and PnL.
Several combos on one account
Trade records a combo position for each combo, so combos on the same account and contract are tracked separately. The exchange records positions by account and contract (and by side and margin mode), not by combo.
Three things to keep in mind:
When positions use cross margin, combos on the same account share that account’s margin.
reconciliation adds up the combo positions for each account and contract and compares the total with the actual position on the exchange. When they differ, handle the combos together with bulk calibration. See What to do about a position difference alert.
Add each exchange account once. To change its key, edit the existing account instead of adding another one.